RecyclerView在consecutivescroller中,能否设置RecyclerView第一个子项吸顶
时间: 2023-12-17 16:27:42 浏览: 151
根据提供的引用内容,可以得知RecyclerView在consecutivescroller中可以设置第一个子项吸顶。具体实现方法如下:
1.在RecyclerView的Adapter中,重写getItemViewType()方法,将第一个子项的类型设置为吸顶类型。
2.在RecyclerView的LayoutManager中,重写onLayoutChildren()方法,判断第一个子项是否可见,如果可见则将其固定在顶部。
以下是示例代码:
```java
public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int TYPE_STICKY = 1;
private static final int TYPE_NORMAL = 2;
@Override
public int getItemViewType(int position) {
if (position == 0) {
return TYPE_STICKY;
} else {
return TYPE_NORMAL;
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_STICKY) {
// 创建吸顶类型的ViewHolder
} else {
// 创建普通类型的ViewHolder
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
// 绑定数据
}
@Override
public int getItemCount() {
// 返回数据项数量
}
}
public class MyLayoutManager extends LinearLayoutManager {
public MyLayoutManager(Context context) {
super(context);
}
@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
super.onLayoutChildren(recycler, state);
View firstView = getChildAt(0);
if (firstView != null && firstView.getTag() != null && firstView.getTag().equals("sticky")) {
int top = 0;
if (firstView.getTop() > 0) {
top = -firstView.getHeight();
}
layoutDecoratedWithMargins(firstView, 0, top, getDecoratedMeasuredWidth(firstView), top + getDecoratedMeasuredHeight(firstView));
}
}
}
```
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